Rotor for elastic-fluid turbines.



Y W. KIBSBR. 4RO'IOR FOR BLASTIG FLUID TURBINES.A AYPLIOATION FILED JUNE 27, 1914.

@Patented Aug. 11, 1914.

Inventor? Walter- Kieser:

WALTER Krassa., or OHARLOTTENBURG, GERMANY, Assielmgim E ELECTRIC COMPANY, A CORPORATION roert.

noroeioia nLasTrc-FLUin "antisemitas,"

` Application filed .Tune 27, 1914. f Serial 210.847.714.

To all "zc/icm it may concern llc it known that l, VALTER Kissen, a citizen of the Swiss Republic, residing at Charlottenburg, Germany, have invented certain new and useful Improvements Vmy Rotors for Elastic-Fluid Turbines, of which 'the followin` is a specification. l

'l`he present inrentionrelates primarily to elastic tluid turbines and has'for its object| to improve the Construction of the rotors thereof. l y

'in operation', the rotor of al steam turbine subjected to compaiatively high tempera; turcs and it sometimes happens that the parts are unerenly heated, the bucket carrying Wheels being heated to a higher temperature than the shaft. This resultsJ in unequal axial expansion of the wheels relative to the shaft which, with ordinary known structures, results in excessive strains, and ma)T result in serious deformations.

my prcsentinrention l provide an imprew ed construction wherein the Wheel hubs luic attached to the shaft and mounted atirely to each other as to permit of a ltain amount of unequal expansionj and to end I so construct and arrange the Wheel hubs that the same may yield relative to each other in a longitudinal direction.

.ln the accompanying drawing 'wherein l have illustrated a preferred embodiment of my invention, Figure 1 is a longitudinal sectional *vieu* of the rotor element of an. elastic fluid turbine; llig. l is a sectional View of one of the Wheels; Fig. 3 is a side View of the ring which is shown surrounding the shaft at approximately the center ofl Fig. l; Fg. Ll is a side View of one of the wheels, and Fig. is an enlarged perspective thereof.

le'-erring to the drawing, indicates they shaft of a rotor upon which are mounted the nubs l carrying the web members 8 which to to make up each rotor Wheel. llhe Wheels may be mounted on the shait't in any approved manner. but l prefer 'to mount them shown in the drawing, wherein the hubs yifounterbored to form rabbcts or grooves each side which lit over the rings l0. i, rings make a driving fit With the and the hubs malte a dri ving lit with 'E he lit between the adjacent surthe shaft and hub need not tight a exact. ln other Words, the wheels are ...red to :fied by the 10. The

mately 1'20 degrees apart.

specification of Letters Patent.; Patentqg 11, 1914.

jrhehels and rings are keyed to theshaft as `indicated at 11, the key-Ways in thewhefels being shown at 12 in igs. 4 and Each hub hasone faceA formecL smooth as.

indicated at 13 (Fig. 2), and the otherface formed with eircinnferentially spacedpro- -jections lh-three being shown' in thepres ent instance. The arrangement of these projections is'bestl shown in Figi( 5. whereinthe same are shown exaggerated .in sir/,c for the sake 'of clearer illustration. The projectlons are shown being spacjd.. approxi- In assembling the Wheelsare arranged 'with the projections of onehubre'sting' againstthe smooth face of the adjacent hub, and with theuprojections of adjacent hubs staggered With relation ,to each other. Thatis..thelirshwheel, as shown to the rightl in ll1 l. will be assembled Withits smooth face aga-inst the ring 15, the next Wheel will-then be placed with itssmooth face against the projections on the hub of the iirstwheel and with its projections circumferentiallj7` displaced from those of the irst by aboutI G degrees. The successive Wheels will then be assembled in like manner.

At two points adjacent Wheels are shown as being spaced apart axially by greater disf tancey than at the remainingl points, and for this purpose suitable spacing rings as shown at 16 and 17 majY be used. The spac ing ring 17 is formed after the same manner as `are the hubs, as will be seen from the drawing particularly 25, Where this spacing ring is shown by itself. The spacing ring 16 is illustrated as being smooth on bot-h faces, although it will bc' understood that it could be formed with projections if found desirable.

The projections 1a amount in substance to spacing pieces which spacev apartthe ad jacent hubs at angular-ly displaced points, and although the same are shown in the presentinstance as being formed integral with the hubs and on one side cnljT of each hub, it is obvious that other specific arrangements may be used. lt is clear that l need .not necessarilj7 provide 'spacing members between all 'the hubs but may provide onlyso many as may be found desirable.

Tlf/Then with the above described arrangement unequal expansion of the hubs relative to the shaft occurs, it Willbe clear that the lGO hubs may yield slightly, thuspermitting ot'- the expansion. and avoiding the excessive strains which would'othe'rwise result.

Although I have described my invention as used connection with a turbine rotor, it will, of course, be understood'that it is not necessarily so limited, .but that it is applicable to other machines wherein a similar condition of unequal heating might occur.

In accordance with the provisions oct the patent statutes, I have'described the principle of operation of .my inventin, together with the apparatus which I now consider to represent vthe best embodiment thereof; but I desire to have it understood thatthe apparatus shown is onlyl illustrative, and that the invention can be carried out by other means.

What I claim as new andv desire to secure by Letters Patent of the United States is 1. The combination in an elastic fluid turbine, of a rotor comprising a shaft, wheels mounted thereon, and spacing members arranged between two or more of the wheels, said members being circumferentially spaced apart with the members on one side .of each wheel staggered with relation to those on the other.

2. The'cox'nbination in an elastic fluid turbine, o a rotor comprising"a shaft, and wheels mounted thereon which are provided on their hubs with projections for spacing apart adjacent hubs, said projections being spaced circumferentially and those on opposite sides of any wheel being staggered rela- 1 tive to each other.

3. In a machine wherein the rotor may be subjected totemperatures causing unequal, expansion, the combination of a shaft,

spaced rings on the shaft, running wheels having their hubs `provided with recesses which-fit to said rings, and spacing members arranged between the wheels, said members being circumferentially spaced apart with the staggered with relation to those on the other.

4. The combination in an elastic fluid turbine, of a rotor comprising a shaft, spaced rings on the shaft,and running wheels having their hubs provided with recesses which fit to said rings, two or more of said hubs being provided with integral spaced projections which serve to space apart'adjacent hubs, the projections on one side of any hub being out of axial alinement with those on the other side. I

In witness whereof, I have hereunto set "my hand this ninth day of June, 1914.

'WALTER KIESER.

Witnesses WILBY NEWMANN, ERNST HELLER.

embers on one side of each wheel 

